SpringBoot启动报Unable to start embedded Tomcat_spring boot unable to start embedded tomcat-优快云博客

本文链接：https://blog.youkuaiyun.com/Ajekseg/article/details/124038379

在将SSM项目转换为SpringBoot过程中遇到错误，启动失败原因是内置Tomcat无法启动。错误信息表明可能是由于之前项目的遗留依赖或额外引入的Tomcat jar包导致冲突。解决方案是检查并删除多余的依赖，特别是Tomcat相关jar包，确保只保留通过Maven导入的必要jar文件。

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我在进行SSM项目转SpringBoot的过程中，报了以下错误：大概的意思是内置Tomcat启动失败。

Exception in thread "main" org.springframework.context.ApplicationContextException: Unable to start embedded container; nested exception is org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:133)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:474)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
    at com.teamtreehouse.core.Application.main(Application.java:10)
Caused by: org.springframework.boot.context.embedded.EmbeddedServletContainerException: Unable to start embedded Tomcat
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.initialize(TomcatEmbeddedServletContainer.java:98)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainer.<init>(TomcatEmbeddedServletContainer.java:75)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getTomcatEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:378)
    at org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory.getEmbeddedServletContainer(TomcatEmbeddedServletContainerFactory.java:155)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.createEmbeddedServletContainer(EmbeddedWebApplicationContext.java:157)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.onRefresh(EmbeddedWebApplicationContext.java:130)
    ... 7 more

可能的原因是之前的SSM项目jar包删除后，Project Strucure 中还存在之前的相关的依赖配置，同时还导入了其它无关的jar包，比如Tomcat（因为SpringBoot已经内置了，所以不需要Tomcat容器），将红色出错部分和无用jar包都删除即可，只保留通过Maven导入的jar：